[RestoCreations]

Quote from Dwight

" A large muffler is quieter than a small muffler on the same car. The large muffler has more room to store the air till it exits the muffler. Glasspacks have fiberglass in them and Flow Master uses metal baffles to slow down the air."

Im going to disagree with you on that one when referring to the sidepipes for cobras and cobra replicas-> Larger internal diameter=more straight through flow=louder. The larger ID pipes also equal less packing material to absorb the SoundWaves.